解方程:χ2-2χ+1=4

问题描述:

解方程:χ2-2χ+1=4

x2-2x-3=0
(x-3)(x+1)=0
x1=3 x2=-1

X²-2X+1=4
χ²-2χ-3=0(x-3)(x+1)=0x1=3 x2=-1

χ2-2χ+1=4
χ2-2χ-3=0
(x-3)(x+1)=0
x-3=0,x+1=0
x=3 x=-1

χ2-2χ+1=4
(x-1)²=4
x-1= ±2
x= 3 或 x=-1